期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：304
期号：5
页码：1-8
DOI：10.1088/1755-1315/304/5/052061
出版社：IOP Publishing
摘要：In order to study the mechanical properties of concrete materials in the normal operation phase of LNG tanks, the longitudinal strain of the loading direction and the transverse strain of the vertical loading at the corresponding temperature were measured by using the resistance strain gauge test technique. The elasticity of the mortar block and stone in the ultra-low temperature environment was studied. Modulus, Poisson's ratio and shear modulus are respectively related to temperature. The results show that the Poisson's ratio of stone and mortar is not obvious with temperature, which can be considered as a fixed value; the elastic modulus and shear modulus of mortar block increase linearly with the decrease of temperature, and the elastic modulus and shear modulus of stone The temperature decrease is a quadratic function relationship of decreasing first and then increasing. The elastic modulus and shear modulus of the stone are all the smallest at around -60 °C. It is concluded that the concrete material has better mechanical properties than the normal temperature environment in the ultra-low temperature environment, and can be used to further improve the design and construction of the LNG tank.
